Nosaka is a Japanese surname. Notable people with the surname include:
Akiyuki Nosaka (1930–2015), Japanese novelist, singer, lyricist, and former member of the House of Councillors Keiko Nosaka (1938–2019), prominent Japanese koto player, specializing in contemporary music Koken Nosaka (1924–2004), Japanese politician Sanzō Nosaka (1892–1993), the co-founder of the Japanese Communist Party
See also Nosaka, Chiba, town located in Sōsa District, Chiba Prefecture, Japan